JPS6013580Y2 - Wire feeding device for underwater dry welding - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention is a wire feeding device used for underwater dry welding such as MIG welding of underwater structures in a chamber suspended from a support ship at sea, This invention relates to a compact type wire feeding device that is compactly installed in the chamber and taken out during welding.In particular, it is a device that has a reel inside the case and a wire feeding mechanism attached to the reel with a motor attached to the power and shield. Gas, water supply and drainage connectors are attached to the case, a splash-proof cap is attached, a pressure equalization device is installed to balance the air pressure between the case and the chamber through the ventilation hole, and a dehumidifier is installed inside the case. This invention relates to a wire feeding device for underwater dry welding that is protected from humidity.

<Prior art> As is well known, underwater welding technology for ships and underwater structures has been actively developed, and among these is so-called underwater dry welding, which performs welding in a chamber suspended from a marine support vessel, etc. has been widely adopted due to its workability, reliability, etc.

Among these, MIG welding equipment has not been used for underwater dry welding, but the problem is based on the following reasons.

<Problems to be solved by the invention> In other words, it is better to make the size and weight of the chamber as small as possible. In order to create a sufficient gas space, He gas is required for at least the volume of the chamber, and in order to reduce the use of such expensive environmental gas (He-0□), many The instruments will be stored in a pressure-resistant hangar.

Similarly, the welding equipment is stored in a hangar, lifted up and lowered together with the chamber, and taken out when necessary.

Therefore, if the wire feeding device is stored in a hangar, it needs to be compact, and the chamber is filled with water when it is suspended, and even after gas replacement. , the walls, ceiling, and floor are wet and there are water drops.

In this way, the inside of the chamber is not completely isolated from water and has high humidity, making the atmosphere too humid for underwater dry welding. The insulation properties are reduced and therefore sufficient safety measures must be taken into account.

For these reasons, if MIG welding is used, there is a drawback that the quality of the welded part may deteriorate if there is moisture adhering to the wire surface.

In addition, in order to take out the equipment from the pressure-resistant hangar and use it,
It needs to have a weight that can be carried by a person, and also requires a sufficient amount of wire, such as a wire with a diameter of 600 mm,
Plate thickness 12rIr! ! A wire amount of several kilograms is required to join two pipes of 100 mm, and a small wire reel for special use requires a small wire amount of 1 kg or less.

Moreover, if a pressure-resistant wire feeding device is used, the weight increases and handling becomes difficult.

The purpose of this invention was to solve the technical problem that hinders the practical use of the wire feeding device installed inside the chamber in underwater MIG dry welding, and basically the case of the device is pressure-equalized with respect to the chamber. It has a dehumidifying function, and the power and water supply and drainage gas connectors are equipped with splash-proof caps.
It is an object of the present invention to provide an excellent wire feeding device for underwater dry welding that is easy to store and has improved workability, thereby benefiting processing technology applications in the marine industry.

<Means/effects for solving the problems> In accordance with the above-mentioned purpose, the structure of this invention, which is summarized in the above-mentioned utility model registration claims, is that in order to solve the above-mentioned problems, the chamber is suspended underwater, and the welding When making preparations, etc., the case of the wire feeding device is stored in a predetermined location within the chamber to improve work efficiency without hindrance to the preparation work, etc. During the process, changes in the hangar internal pressure during the chamber lifting process are handled by equalizing the pressure of the case. The pressure inside the case from the ventilation hole of the device and inside and outside the case is equalized, and the pressure is dehumidified by the dehumidifier in the pressure equalization device. Salt and other substances are also absorbed, making the wire moisture-proof, rust-proof, and
In addition, measures are taken to protect against electric shock, and splash-proof caps are attached to power, water supply, drainage, gas, etc. connectors to prevent water from entering, and when welding, pull out the case from the storage position. A technical measure has been taken in which the welding is performed by installing the welding device in place, removing the splash-proof cap, and connecting a torch to the connector.

<Embodiment - Configuration> Next, one embodiment of this invention will be described below based on the drawings.

1 is a wire feeding device for underwater dry welding, which embodies the gist of this invention; its case 2 is made of a lightweight metal such as aluminum; the front is rectangular, the sides are trapezoidal; A lid body 4 can be opened and closed via a hinge 5 and a hook 6 via a gasket 3.

Reference numerals 7 and 8 denote handles, and the wire supply device 1 is stored in a predetermined pressure-resistant hangar in a chamber (not shown) that is provided at the upper part and the inclined front part of the case 2 and is suspended by a support ship (not shown). It is used as a means for setting and pulling out.

The couplers 10 to 14 of the connector group on the input side for welding are arranged on the input side A on the negative side of the case 2 in the longitudinal direction, and the couplers 10 to 14 of the connector group on the input side for welding are connected to the solenoid valve 9 installed inside from above. A gas coupler 10, water supply and drainage couplers 11 and 12, a conduit coupler 13, and a power cable coupler 14 are provided in this order, each with a splash-proof cap.

On the other hand, on the inclined part of the output side B opposite to the input side A, the power of the connector group connected to the input side, a drainage connector 15, a water supply connector 16, a gas connector 17,
Torch switch connector 18, conduit connector 19
A group of connectors are provided, each of which has a splash-proof cap that is removably engaged with the case 2 via a checker 7.

The connector groups 10 to 14 on the inlet side A and the connector groups 15 to 19 on the outlet side B are connected by predetermined cables, pipes, and hoses.

A pressure equalizing device 20 is provided on the output side B, and its small-diameter ventilation hole 21 is designed to communicate and ventilate the case 2 and the inside of the chamber. A predetermined amount of silica gel or the like is filled.

As shown in the figure, a welding wire reel 23 is rotatably mounted between the cables, wires, pipes, etc. of the connector group on the input side A connected to the side wall of the case 2. A wire feeding mechanism 26 connected to a feeding motor 24 and a speed reducer 25 is provided adjacent to the wire strainer 27 and wire guide 28.

<Embodiment - Effect> In the above-described configuration, the wire feeding device 1 is set in a predetermined pressure-resistant hangar of a chamber (not shown), and the chamber is suspended in the sea at a predetermined position by a guide wire from a support ship (also not shown).

Next, by replacing the gas inside the chamber, the inside of the chamber becomes a gas space with a pressure condition according to the water depth. Therefore, when working underwater, the pressure in the pressure-resistant hangar is equalized to the pressure inside the chamber, and then the door is opened and the However, at the same time as the pressure in the pressure-resistant hangar is equalized, the pressure inside the case 2 of the wire feeding device 1 is also passed through the vent hole 21 of the pressure equalizing device 20. As the pressure inside the chamber is increased, the pressure is substantially equalized, and therefore it is possible to use the chamber without directly contacting seawater.

Therefore, functional deterioration and loss of electrical components such as the electromagnetic valve 9 and the motor 24 inside the case 2 are avoided, and the electrical components are always maintained in a state that can be used for normal welding work.

After the chamber reaches a predetermined depth, the dialer or welder pulls out the case 2 from the storage position using the handle 8, and removes the shield gas hose, cooling water supply and drainage hose (not shown), which have been stored in advance from the pressure-resistant hangar. Take out the conduit cable and power cable tube, and connect the corresponding connectors 15 to 19 on the inlet side A of the case 2.
After that, the splash-proof caps of the connectors 15 to 19 on the outlet side B are removed and connected to a torch (not shown), and the torch is directed toward an object to be welded, such as a pipe, facing into the chamber. , activate the torch switch to start the MIG welding arc.

During this time, as mentioned above, the wire feeding device 1 is placed in a moisture-proof state while being in an equal pressure state in the case, so it is not in a wet state or a state similar to it, and the wires and cables in the case etc. are always free of moisture, ensuring high quality welds.

Furthermore, even when the surface of the case is wet, sufficient insulation is ensured, so there is no risk of electrical leakage.

In this way, the MIG weld is connected in place, cooling water is supplied and discharged, shielding gas is also supplied, and the wires are connected to the motor 2.
4 continuously feeds from the reel 23.

Then, when the welding work is completed, the torch is removed, a splash-proof cap is fitted to each of the connectors 15 to 19, and the case 2 is stored again in the pressure-resistant hangar via the handle 8.

In addition, the embodiment of this invention is not limited to the above-mentioned example,
Various other embodiments can also be adopted, and various designs are also possible, such as making each connector a ball bearing to facilitate welding work.

Moreover, not only welding using a wire such as applied welding MIG, but also shielded arc welding can be performed by simply replacing the torch.

<Effects of the invention> As described above, according to this invention, the wire feeding device used for underwater dry welding is equipped with a compact case that can be taken out from the hanging chamber as the case of the wire feeding device. It is possible to store and retrieve functionally in a narrow chamber, and it does not interfere with preparation work and welding work, improving efficiency. inspection,
Repairs can be carried out smoothly, resulting in improved welding accuracy and a superior quality product.

In addition, connectors for power, shield gas, cooling water supply and drainage, etc. are provided on the side of the case, and each connector has a removable splash-proof cap, making it possible to connect the torch only when welding. During this time, the torch can be stored and set, so there is no risk of the torch being damaged or rusting, which also has the effect of maintaining the durability and functionality of the mechanism.

Then, just connect and disconnect the torch to the connector.
Therefore, it is easy to operate, which has the effect of improving work efficiency.

Furthermore, by providing a pressure equalization device containing a dehumidifier in the case, the case and the chamber are always kept at equal pressure through the vents of the pressure equalization device, so that the chamber internal pressure increases with water depth. However, the pressure inside the case is equalized with the inside of the chamber, so there is no need for a pressure-resistant structure for the case, which means that the case can be made thinner, the volume can be used more effectively, and manufacturing is easier and lower cost. There is a possible effect.

Furthermore, since a dehumidifying agent is installed in the ventilation section, it is possible to prevent humidity increases and salt intrusion that have previously occurred unavoidably during underwater welding. Therefore, despite uniform ventilation, moisture absorption and Salt is avoided, which not only prevents rust, but also keeps the wire clean.
High-quality welding is possible, the risk of electrical leakage is prevented, and durability is improved.
This has the excellent effect of improving safety.

[Brief explanation of drawings]

The drawings are explanatory diagrams of one embodiment of this invention, in which Fig. 1 is a plan perspective view, Fig. 2 is a side perspective view, Fig. 3 is a front view, and Fig. 4 is a perspective view.
The figure is a partially cutaway rear view. 2... Case, 24, 25... Wire feeding mechanism, 1... Wire feeding device, 21.
・Open vent, 20... Pressure equalization device, 15-19・
...Connector, 9...Wire reel, 2
4...Motor.

Claims (1)

[Scope of utility model registration request] A wire feeding device having a wire feeding mechanism in a case removably installed in an underwater suspension chamber, wherein the case has a ventilation hole communicating with the case and the chamber, and a pressure equalization device containing a dehumidifier. It is equipped with connectors for power, shielding gas, water supply and drainage inputs on one side, and output connectors for torch connection power, shielding gas, water supply and torch switch, and a wire reel and a wire reel inside. 1. A wire feeding device for underwater dry welding, characterized in that a wire feeding mechanism with a motor is provided, and a splash-proof cap is removably provided on each of the output connectors.